Sadly, Flitz being abrasive is an oft quoted firearms myth.
Flitz says themselves on their website it is non abrasive. It is a chemical polish that does not contain any abrasive compounds.
You are absolutely correct about what Flitz claims.
However, in spite of that, Flitz is definitely abrasive.
Here's the MSDS for the standard Flitz polish.
https://store-imlukvc.mybigcommerce.com/content/SDS - PastePolish_2021.pdf
Scroll down far enough and this appears: CAS 1344-28-1 Aluminum Oxides
Aluminum Oxide is, of course, an abrasive.
The reason Flitz can officially say it's non-abrasive is that the abrasive particles in it are small enough (3 to 3.5 microns) to satisfy some rule somewhere that differentiates between "abrasive" abrasives and "non-abrasive" abrasives based on the size of the abrasive particles.
Here's an email I found on the web from Flitz customer service.
Sir,
I'm sorry to keep you waiting for the answer to your question. I had to wait for our president, Ulrich "Olie" Jentzsch, to return from two trade shows for his official statement.
The gentleman that stated "if it is a polish, it has to be abrasive" is right in a very literal sense. However, you are also right about the Flitz, because our polish falls 12% below the government standard for abrasiveness. In other words, the polishing granules are so fine that Flitz can be considered non-abrasive. We can safely claim that because, as you can feel just by putting it between your fingers, it is very smooth. Flitz can be used on even the softest precious metals without scratching. (Of course, a person would have to consider the applicator cloth and make sure they are using a clean, high-quality, soft cloth to apply the polish and for buffing.)
I hope that this helps you. You are welcome to address any other questions or problems to us directly at
[email protected] (for Customer Service) or
[email protected] (for the president). Thank you again for your question and for using the Flitz. We always stand behind it and it's nice to have customers like yourself.
Kris
Flitz Customer Service